Electrical checking device



Aug. 24, 1954 R. T. HALL 2,687,454

ELECTRICAL CHECKING DEVICE Filed June 19, 1950 2 Sheets-Sheet 1INVENTOR. ROBERT T. HALL BY ATTORNEYS Aug. 24, 1954 R. T. HALL 2,687,454ELECTRICAL CHECKING DEVICE Filed June 19, 1950 2 Sheets-Sheet 2 FIG].

INVENTOR. ROBERT T. H A LL BY ATTORNEYS Patented Aug. 24,1954

UNITED STATES PATENT OFFICE 2,687,454 ELECTRICAL CHECKING DEVICE RobertT. Hall, Birmingham, Mich, assignor to Kelsey-Hayes Wheel Company,Detroit, Mich., a corporation of Delaware Application June 19, 1950,Serial No. 168,930 1 Claim. (Cl. ZOO-451.41)

rotatable articles. transversely of and threadedly engaging the Theinvention has for one of its objects to proflange 6 of the slide and I9is a second electrical vide an improved device for checking dimensionalcontact movable between the contact Q and the variations of individualarticles which device is flange of the slide. The contact it forms partso constructed that it is eificient in operation and of the arm ll ofthe bell crank l2 which is may be economically manufactured. in plvotaly and electrically connected by the pm The invention has for anotherobject to pro- 13 to the lateral pro ection I4 at the flee end of vide acheck ng dev ce which is automatically the long arm of the plate 2 Theother arm 15 of operable upon dimensional vailation greater the bellcrank has ournalled thereon the roll [5 than that al owed in commercialp1 actlce which is engageable with the the carrying rim 2'.

The invention has for a further object to pro- 15 and more particularlythe axially outer surface vide a checking device having an electricalconof the tire retaining flange [8 of the rim. For

tact mounted on a slide which is adapted to be normally urging the bellcrank to swing in a the contact if the dimensional variation is he rimis mounted on the Wheel body 01 greater, spider 2| which in turn ismounted on and With these and other ob ects in VleW the incur d to th rt bl p nd 22 Th pp vention resides in the novel features of construclWlth the parts eallled thereby is m vab e 0- tion and combinations andarrangements of parts Wald the 11m and spider to engage the 1011 It asmore fully hereinafter set forth: with the tire retaining flange 18 ofthe rim at In the drawings; which time the arm ll of the multiplier bellFigures 1 and 3 are respectively a top plan and crank, and moreparticularly, the contact l0 ena, side elevation of the device; gagesthe flange 5 0f the slide and moves the Figure 2 is a side elevation ofthe device em- Slide along the d 7 d the plate 3 to a position bodyingthe invention applied to an article which dependent p e highest p n Ofth ax ly i h w i ti outer surface of the tire retaining flange engagedFigure 4 is a View s m la to F gu e 1 showing by the roll. The COntaCt 91S ad usted SO that its he device applied to the same article for check-Contact Iaee 1S Spaced m the pp ed face of 111g a d iferent d n lvanatlo the flange 6 a predetermined distance such tnat gure 5 1s a, news mflar to F gure 1 show ng during the rotation Of the nm the contact ina mod fied constructlon of devlce, will not engage the contact 9 1f thelateral lun- Fjgure 6 1S from; l m thereof out of the rim 15 withincommercial limits out the F gure 7 1S a w slmilar t Flgure 6 showlng twocontacts W111 be engaged if the lateral runanothei modified constructionof device. Out is t While the device may be used to check dimen- For thepurpose of h d ng the slide 4 in the sional variations in a large numberof articles, Positlon to Which it is djusted by the hell or ank such as,disks, hubs, brake drums, rims, blocks, I2, I e d d the device 23 whichin the The device comprises the electrical conducting a Suitable SourceOf electric power y th lines as a light, bell or a reject device (notshown) or a combination thereof.

As illustrated in Figure 4, the device is used to check the radialdimensional variation or runout of the tire carrying rim and moreparticularly one of the tire bead seats 21 of the rim during itsrotation. It will be noted that the construction of the device is thesame as that 2 and 3 but it is mounted at right angles so that it isquite important to provide means such as the permanent magnet forholding the slide in the position to which it is adjusted by themultiplier bell crank since the slide might otherwise drop to itsinoperative position.

In operation when either device is brought. into operative relation tothe article to be checked, and more particularly the tire carrying rim,the roll of the device engages the article and through the multiplierbell crank automatically adjusts the slide relative to the support to aposition determined by the highest point of the surface of the articleupon its rotation since the adjustable electrical contact is set toallow a predetermined variation in distance from the highest point tothe lowest point of the surface of the article being checked. The devicewill make or complete the electric signaling circuit if the dimensionalvariation or run-out is in excess. However, if the variation is withinthe commercial limits allowed the device will not operate to make orclose the electric circuit.

The device illustrated in Figures 5 and 6 differs essentially from thedevice of Figures 1, 2 and 3 in having a direct acting plunger formaking and breaking the electric circuit. More particularly the devicecomprises the electrical conducting channel-shaped plate 28 forming thesupport, the insulator channel-shaped slide 29 having its base slidableover the base of the plate and its flanges 30 and 34 slidable over therods 32 which extend between and are mounted on the end flanges of theplate. 33 is the adjustable electrical contact extending transversely ofand threadedly engaging the flange 30, and 34 is the cooperating contactmounted on and forming part of the head 35 of the plunger 35 whichslidably extends through the flange 30 and has a rounded end engageablewith the surface of the work to be checked. 3! is a coilspring extendingthrough a hole in the flange 3! of the slide and abutting the head 35and the adjacent end flange of the plate 28 and forming an electricalconnection between the end flange and the head. The end flange and theadjustable electrical contact are connected by suitable electric linesto the source of power and the signaling mechanism.

The device illustrated in Figure '7 is in general the same as thatillustrated in Figures 5 and 6 with the exception that both electricalcontacts are carried by the slide. In detail, the flange 38 of thechannel-shaped slide 39 adjustably carries the transversely extendingtube 49 which is preferably formed of insulating material. This tubecarries the electrical contact the electrical contact l2 which latterextends over and is normally spaced above the contact M and is inposition to be engaged by the head 43 of the work engaging plunger M5.The electrical contacts are directly connected to the source ofelectrical power by electric lines including the signaling mechanism.The tube MI is adjustably mounted.

In operation, it will be seen that in the devices of Figures 5 and 6 andFigure '7, the plungers automatically adjust the slides to predeterminedpositions relative to their supports dependent upon the highest pointsof the surfaces of the articles being checked and control the making orclosing or" the electric circuits in the event that the lowest points ofthe surfaces of the articles being checked are spaced in excess of thepredetermined amount.

It will be noted that all of the above devices are operative to checkdimensional variations of individual articles without particularreference to each other since the slides are adjustable through aconsiderable range. Therefore, the articles being checked need not havethe same basic dimensions.

What I claim as my invention is:

An electrical device for checking dimensional variation of an articlecomprising an electrical conducting support, a channel shaped insulatorslide mounted on said support and movable relative thereto transverselyof the flanges of said slide, an electrical contact adjustably mountedon one of the flanges or said slide, an electrical conducting membermovably mounted on and electrically connected to said support and havinga part movable between and engageable with said contact and the otherflange of said slide and a part engageable with the article, said memberupon engagement with said other flange being adapted to adjust saidslide relative to said support, and magnetic means for normally holdingsaid slide in adjusted position.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 847,981 Brown Mar. 19, 1907 2,179,517 Pelosi .i Nov. 14, 1939FOREIGN PATENTS Number Country Date 691,368 France Jan. 30, 1930 ill andalso

